X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Flibrustc%2Fhir%2Flowering.rs;h=ef6a6ae23dc2f8efcd209a6443abfe2e592b1e0d;hb=c5bb2ec0dd1f6f38117ec0e7e22c077a4b74dc09;hp=f2d5f043f909dcd60b6d731bf3636e30c005b7b9;hpb=86c28325ff813e5cf4d0cab320a7c9f6fb0766b8;p=rust.git

diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index f2d5f043f90..ef6a6ae23dc 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -74,6 +74,8 @@
 use syntax_pos::hygiene::ExpnId;
 use syntax_pos::Span;
 
+use rustc_error_codes::*;
+
 const HIR_ID_COUNTER_LOCKED: u32 = 0xFFFFFFFF;
 
 pub struct LoweringContext<'a> {
@@ -452,7 +454,6 @@ fn visit_item(&mut self, item: &'tcx Item) {
                     | ItemKind::Union(_, ref generics)
                     | ItemKind::Enum(_, ref generics)
                     | ItemKind::TyAlias(_, ref generics)
-                    | ItemKind::OpaqueTy(_, ref generics)
                     | ItemKind::Trait(_, _, ref generics, ..) => {
                         let def_id = self.lctx.resolver.definitions().local_def_id(item.id);
                         let count = generics
@@ -1217,7 +1218,7 @@ fn lower_ty_direct(&mut self, t: &Ty, mut itctx: ImplTraitContext<'_>) -> hir::T
                                     &NodeMap::default(),
                                     ImplTraitContext::disallowed(),
                                 ),
-                                unsafety: this.lower_unsafety(f.unsafety),
+                                unsafety: f.unsafety,
                                 abi: this.lower_abi(f.abi),
                                 decl: this.lower_fn_decl(&f.decl, None, false, None),
                                 param_names: this.lower_fn_params_to_names(&f.decl),
@@ -1860,15 +1861,16 @@ fn lower_path_segment(
                         if let Ok(snippet) = self.sess.source_map().span_to_snippet(data.span) {
                             // Do not suggest going from `Trait()` to `Trait<>`
                             if data.inputs.len() > 0 {
-                                let split = snippet.find('(').unwrap();
-                                let trait_name = &snippet[0..split];
-                                let args = &snippet[split + 1 .. snippet.len() - 1];
-                                err.span_suggestion(
-                                    data.span,
-                                    "use angle brackets instead",
-                                    format!("{}<{}>", trait_name, args),
-                                    Applicability::MaybeIncorrect,
-                                );
+                                if let Some(split) = snippet.find('(') {
+                                    let trait_name = &snippet[0..split];
+                                    let args = &snippet[split + 1 .. snippet.len() - 1];
+                                    err.span_suggestion(
+                                        data.span,
+                                        "use angle brackets instead",
+                                        format!("{}<{}>", trait_name, args),
+                                        Applicability::MaybeIncorrect,
+                                    );
+                                }
                             }
                         };
                         err.emit();
@@ -2081,13 +2083,6 @@ fn lower_parenthesized_parameter_data(
         }, ids)
     }
 
-    fn lower_mutability(&mut self, m: Mutability) -> hir::Mutability {
-        match m {
-            Mutability::Mutable => hir::MutMutable,
-            Mutability::Immutable => hir::MutImmutable,
-        }
-    }
-
     fn lower_fn_params_to_names(&mut self, decl: &FnDecl) -> hir::HirVec<Ident> {
         // Skip the `...` (`CVarArgs`) trailing arguments from the AST,
         // as they are not explicit in HIR/Ty function signatures.
@@ -2657,7 +2652,7 @@ fn lower_poly_trait_ref(
     fn lower_mt(&mut self, mt: &MutTy, itctx: ImplTraitContext<'_>) -> hir::MutTy {
         hir::MutTy {
             ty: self.lower_ty(&mt.ty, itctx),
-            mutbl: self.lower_mutability(mt.mutbl),
+            mutbl: mt.mutbl,
         }
     }
 
@@ -2758,7 +2753,7 @@ fn lower_pat(&mut self, p: &Pat) -> P<hir::Pat> {
             }
             PatKind::Box(ref inner) => hir::PatKind::Box(self.lower_pat(inner)),
             PatKind::Ref(ref inner, mutbl) => {
-                hir::PatKind::Ref(self.lower_pat(inner), self.lower_mutability(mutbl))
+                hir::PatKind::Ref(self.lower_pat(inner), mutbl)
             }
             PatKind::Range(ref e1, ref e2, Spanned { node: ref end, .. }) => hir::PatKind::Range(
                 P(self.lower_expr(e1)),